What does Tamsyn mean?
Tamsyn \t(a)-ms-yn, tam-syn\ as a name for girls. Tamsyn's roots are English and Aramaic, and the meaning of the name Tamsyn is "twin". Tamsyn is a variation of Tamsin (English, Aramaic): short form of Thomasina. See also Thomasina.
Tamsyn is an uncommonly occurring given name for females. Tamsyn is also an uncommon surname for all people. (2000 U.S. Census)
Shown below is the birth name popularity of Tamsyn for girls. Tamsyn has yet to make it into the Top 1000 thus far. (2014 Birth Statistics)